Loading of chunks , worlds take long time

Loading of chunks take approxmately 10 seconds to load . When flying with elytras this can be very dangerous as the player will die . My phone would lode the chunks very fast before the update so this has happened because of the update . Worlds will aslo take appr 50 seconds as before it would take 20 sec . I know it is not a lot of difference but still this needs to be fixed . I hope you look into to this.